package com.nowcoder.community.controller;

import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.MessageService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.nowcoder.community.util.XaCommunityConstant.ENTITY_TYPE_POST;

@Controller
public class HomeController {
    @Resource
    private DiscussPostService discussPostService;
    @Resource
    private HostHolder hostHolder;
    @Resource
    private UserService userService;
    @Resource
    private LikeService likeService;
    @Resource
    private MessageService messageService;
    @GetMapping( "/index")
    public String getIndexPage(Model model, Page page,
                               @RequestParam(name="orderMode",defaultValue="0") int orderMode) {
        // 方法调用钱,SpringMVC会自动实例化Model和Page,并将Page注入Model.
        // 所以,在thymeleaf中可以直接访问Page对象中的数据.
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index?orderMode="+orderMode);

        List<DiscussPost> list = discussPostService.findDiscussPosts(0, page.getOffset(), page.getLimit(),orderMode);
        List<Map<String, Object>> discussPosts = new ArrayList<>();
        if (list != null) {
            for (DiscussPost post : list) {
                Map<String, Object> map = new HashMap<>();
                map.put("post", post);
                User user = userService.findUserById(post.getUserId());
                map.put("user", user);
                discussPosts.add(map);
                long likeCount=likeService.findEntityLikeCount(ENTITY_TYPE_POST, post.getId());
                map.put("likeCount",likeCount);
            }
        }
        model.addAttribute("discussPosts", discussPosts);

        //4.查询未读私信数量
        int letterUnreadCount = messageService.findLetterUnreadCount(hostHolder.getUser().getId(),null);
        model.addAttribute("letterUnreadCount",letterUnreadCount);
        
        model.addAttribute("orderMode",orderMode);
        return "/index";
    }
    @GetMapping("/error")
    public String getErrorPage(){
        return "/error/500";
    }
    @GetMapping("/denied")
    public String getDeniedPage() {
        return "/error/404";
    }
}
